Coupling



March 23, 1937. N. CHIRELSTEIN COUPLING' Filed Oct. 10, 1955 2Sheets-Sheet l BY 3 g ATTonu gs March 23', N CH|RELSTE|N 7 2,074,957

COUPLING Filed Oct. 10, 1935 2 Sheets-Sheet 2 INVENTOR JMMQ ATTORNEYSPatented Mar. 23, 1937 UNITED STATES PATENT orrice 8 Claims.

My invention relates to electrical coupling constructions designed foruse with heating vessels of various types.

The object of my invention is to provide a construction, the parts ofwhich are strong and easily made at a low cost, and that may beassembled in separable relation by unskilled Workers without loss oftime.

Referring to the drawings which form a part of this specification:

Fig. l is an elevational exterior view of a coupling embodying myinvention.

Fig. 2 is a side elevational view thereof.

Fig. 3 is a vertical sectional view.

Fig. 4 is an inverted plan view of the upper portion of the body orcasing; (see Figure 3, at 44).

Fig. 5 is a plan view of the lower portion of the body; (see 55,Figure3).

Fig. 6 is a perspective view of one of the coupling conductor elementscomprising the terminal socket.

Fig. '7 is a perspective view of a resilient sheet metal cap element.

Fig. 8 is a view of a binding wire used to hold the parts of the bodyportion, cap, and interior parts together in assembled relation.

Fig. 9 is a view of a part of the two binding wires, the ends of whichare bent as shown in Figure 8.

Fig. 10 is a fragmental view showing one end of two of the bindingwires, inserted into recesses formed in the lower portion of the body,on opposite sides thereof.

l0 indicates the lower portion of the body, and H the upper portionthereof, both of which are moulded of insulating material.

The lower portion is formed to provide two chambers l2l2 respectively,by means of a central partition I3, the upper part of which is reducedin Width as illustrated in Fig. 3, to provide a shoulder M on each sidethereof.

In each of said chambers is a socket member i5 formed in a single pieceof thin resilient sheet metal.

The folded upper end I5 of each of said members is bent into contact andprovides sufficient thickness of material to hold a thread into which isscrewed a binding-screw it.

One end of each of the closely folded portions of each socket member, isextended beyond the width of the bifurcated part forming the socketjaws, and is spread apart to form an inverted v-shaped end, asillustrated at I1 and the under side of the said extended portions reston the shoulders M respectively, and are clamped in position thereon bythe binding wires which hold the body portions together as shown at H3.

The upper portion of the body is of greater width than that of the lowerportion, to provide extended gripping surfaces |9|9 respectively, andslots 20-20 respectively are formed therein toreceive the ends 2| of thecap-piece 2|, said ends being bifurcated to provide spring action bymeans of which the forked ends may move toward each other in passingthru the narrow portion of the slot 20 to the wider portion 20therebelow, to hold the cap to the body portion when the binding wiresare not in position above the cap, or when the top portion is removedfrom the lower portion.

The body portion II is also formed with outwardly extending portions Il'll respectively, as shown in Figures 2 and 4, to also serve asgripping surfaces and to strengthen the casing.

The upper portion II is formed with a chamber 23 which extends from itsunder side nearly to the top side thereof for the purpose of housing thewire conductors 24, the lower wall being formed with recesses at- 25 toreceive the upper end of the partition l3, and a circular recess isformed in its upper side to receive the enlarged coiled lower end of thewire guard 26 formed to provide a resilient spring, the upper side ofwhich presses against the under side of the thin resilient cap 2| andtransmits the pressure to the binding wires.

The ends of the binding wires 22 are bent inwardly as shown in Figures 8and 10, and extend into recesses 2'l2'l respectively, formed in thelower portion l0, and their upper looped portions swing over the cap andhold the spring in a compressed condition, thus also holding the bodyportions and metal parts together, as will be readily understood.

In making the body portions I prefer to form outwardly extending bosses2828 respectively, on two opposite sides of the body portion as shown,partly to protect the binding wires and also to effect an ornamentalappearance.

To prevent accidental displacement of the wire loops I have formed thecap with upwardly extending shallow corrugations 29-29 respectively,over which the loops may pass in the assembling operation.

In assembling the parts, the spring portion of the wire shield isthreaded thru the central opening in the cap and the cap then attachedto the upper portion II by inserting its bifurcated ends in the slots inthe top, and pressing the cap downward into its normal position.

The socket members are then placed in posi tion in the lower portion land then the two body portions are assembled and locked together by thebinding wires, as will be readily under- 5 stood.

The construction is strong and durable, is easy to assemble and handle.

Having thus described my invention I claim as new:

1. An electric coupling of the character described comprising a bodyportion formed in two half parts of plastic insulating material placedend to end and defined as the upper and lower parts, said lower parthaving two chambers formed by a middle partition having shoulders formedin the upper part of the sides thereof, socket members in said chamberseach of which is formed with an extension on one side thereof whichrests on one of said shoulders, and means comprising looped wires whichextend from the lower part of the body over the upper part in swingingrelation to hold the body parts together.

2. An electric coupling of the character described comprising a bodyportion having two chambers formed therein by a middle partition havingshoulders formed in the upper part of the sides thereof, socket membersin said chambers each of which is made of resilient sheet metal in asingle piece and formed with an extension on one side thereof whichrests on one of said shoulders, the end of said extension being formedin the shape of an inverted V to provide two points of contact with saidshoulder formed on the par" tition.

3. A coupling of the character described comprising a body portionformed in two half parts of insulating material placed end to end anddefined as the upper and lower parts, sockets located in the lower part;said upper part having a central bore extending therethru and having arecess formed in its top adjacent said bore, a thin cap extending oversaid recess and having a hole therein, a wire guard the lower end ofwhich is bent to form a helical spring which rests in said recess undersaid cap, and means comprising looped Wires for holding the cap and bodyportions together in assembled relation.

4. The construction defined in claim 3, together with and means forinterlocking the cap with the upper body part.

5. A coupling of the character described comprising a body portionformed in two half parts of insulating material placed end to end anddefined as the upper and lower parts, said lower part having a recess inopposite sides thereof, a cap extending over the upper part, and loopedbinding wires having inturned ends which are located in said recessesand the loo'ps of which extend over said cap to hold said partstogether.

6. The construction defined in claim 5, together with said upper parthaving a vertically extending slot formed in each end thereof and saidcap having downwardly extending ends which rest in said slots.

7. A coupling of the character described comprising a body portionformed in two half parts of insulating material placed end to end anddefined as the upper and lower parts, said lower part having means forholding the ends of the binding wires, a thin resilient cap extendingover the upper part, the ends of which are bent at an angle to its topsurface and are bifurcated, said upper part of the body being formedwith extended end portions in which are formed vertically extendingslots with shoulders formed on the under side thereof under which thebifurcated ends of the cap rest to hold the cap to said upper part, andbinding wires having loops formed therein which rest on said cap and areattached to said lower part of the body.

8. A coupling of the character described comprising a body of insulatingmaterial formed in two half parts defined as the upper and lower parts,said lower part having a partition the upper sides of which are reducedin thickness to provide a shoulder on each side thereof, socket membersresting on said shoulders the upper ends of which are positioned belowthe top of said partition and the upper part of the body having a recessformed in its under side into which said partition projects, therebyforming two socket chambers entirely within said lower part; said upperpart having its lower end formed to fit within the lower part and abutsaid socket members, and means consisting of wires held in pivotalrelation by the lower part and extending over the upper part for holdingsaid body parts together in easily separable relation.

NATHAN CHIRELSTEIN.

